Washing apparatus



March 26, 1935. J. H. CLARK 1,995,634

wAsHxNG APPARATUS Original Filed March 14, 1933 2 Sheets-Sheet 1 Fig.

. ,5b Jesse H. Clark, 67 m E@ Ma H15 Attormeg.

March 26, 1935.

J. H. CLARK WASHING APPARATUS Y i v original Filed Maren' 14. i933Sheets-sheet' 2 IIO Fig 7.

l-Is Attorney Patented Mar. 26, 1.9.35 1,995,634

UNITED STATES PATENTVGFFICE WASHING APPARATUS Jesse H. Clark, Cicero,Ill., asslgnor to Walker Dishwasher Corporation, Chicago, lll., acorporation of Delaware Application March 14, 1933, Serial No. 660,683

Claims. (Cl. 141-9) My invention relates to washing apparatus, betweenthe iluid supply and drain conduits armore particularly to dishwashingapparatus, and ranged so that when fluid is flowing from the suphas forits object the provision of improved apply to the drain conduit and themain drain paratus of this character. valve is open, an aspirator actionwill be effected o 1More specifically, my invention relates todishwhereby movement of the soiled fluid from the 5 washing apparatuswherein a cleansing fluid, vat is caused by the flow of water from thesupply such Vas water, is circulated or hurled through conduit throughthe aspirator. the washing chamber orvat by suitable power In anotherform of my invention a suitable driven means, such as a motor drivenimpeller, mechanicalv pump is provided for withdrawing 10 and has as oneof its objects the provision of the soiled water from the vat. In thisform, I 10 Yimproved means for supplying the washing vat also provide apump for forcing water into the with a predetermined quantity ofcleansing water vat under pressure. 'I'his pump is separated so that themost eiiicient cleansing action will be from the drain pump so that itis impossible for effected. the fluid supply pump to become contaminatedby l5 Another object of my invention is the provision the soiled iluid.that ilows through the drain l5 of improved means for draining the vatof 'soiled pump. cleansing fluid after the washing operation has Ineither form of the invention the drain valve been nished. controllingthe drain port is operably associated In carrying out my invention inone form there- -with lthe valve mechanism controlling the fluid of, Iprovide suitable conduits for supplying the supply and drain conduits sothat when the drain l0 washing vat with a fresh cleansing liuid, and forvalve is closed, the electro-magnetic device is' draining the soiledlluid from the vat after the conditioned to effect the subsequentoperatonof cleansing operations have been eiected. Suitthe valvemechanism to divert the iiuid supply able valve means are provided forcontrolling from the vat to the drain when a predetermined theseconduits so as to establish communication quantity of fluid has beensupplied to the vat. 26 between the uid supply conduit and the vat orFor a more complete understanding of the in- Abetween this conduit andthe drain conduit vention reference should be had to the accomwherebythe supply fluid can be diverted from the panying drawings, in whichFig. 1 is a fragvat to the drain. mentary elevation of dishwashingapparatus em- The valve means for these conduits is conbodying theinvention, portions being shown in 30 tlolled in accordance with theload imposed on the section and portions being broken away so as motorin driving the fluid circulating means in to illustrate certainstructural details; Fig. 2 is a the vat, that is, in accordance with thequantity sectional view taken through the line 2-2 of of water that hasbeen supplied to and allowed Fig. 1; Fig. 3 is an elevation illustratingcertain to accumulate in the yat, so as to divert the control mechanismused in the dishwashing ap- 35 fluid from the vat when a predeterminedquantity paratus of Fig. l; Fig. 4 is a view similar to Fig. 3,

, has been supplied. For this purpose, a suitable but illustrating thecontrol mechanism in a difelectromagnetic device is provided foroperating ferent operative condition; Fig. 5 is a view simithe valvemeans to a controlling position to establar to Figs. 3 and 4, butillustrating the control lish communication 4between the fluid supplyand mechanism in still another operative condition, 40'

drain conduits when a sufficient quantity of fluid and also showingdiagrammatically the motor has been supplied to the vat to impose a loadof provided in the apparatus of Fig. 1 for driving predeterminedmagnitude upon the iluid cirthe fluid circulating means in the vat andthe culating means driving motor. In this manner, electrical connectionsbetween the control mech-- l5 a predetermined quantity of washing fluidis anism of Figs. 3 and 4 and the motor; Fig. 6 is 45 measured andsupplied to the vat. Preferably, a fragmentary view, mainly in section,of a modithe electromagnetic device will be operated in acfied form of auid aspirator used in the apcordance with an operating condition of theparatus of Fig. 1; Fig. 7 is a fragmentary view in motor, such as themagnitude of the motor armaelevation of washing apparatus embodying ature current. modiied form ofthe invention; Fig. 8 is a frag- 50 Inorder to drainthe vat of soiled cleansing mentary view in elevation of aportion of the fluid after the cleansing actions have been apparatus ofFig. 7, portions being shown in seceffected, a valve controlled drainport is protion so as to illustrate certain structural details; vided inthe vat and in one form of my invention Fig. 9 is a view similar to Fig.8, portions being an aspirator is provided in the fluid passageway shownin section on a line taken through the line 55 9 9 of Fig. 8; and Fig.10 is a view vin elevation of a portion of the washing apparatus of Fig.7, and also showing in diagrammatic form a motor used in this washingapparatus, together with certain control mechanism also used in thisapparatus and arranged in accordance with the invention.

Referring to Figs. l to'5, inclusive, the invention in one form is showninconnection with dishwashing apparatus comprising an upright washingchamber or vat 10 for receiving dishes and like utensils to be cleansedand also some suitable Washing iiuid, such as hot cleansing4 water. Thevat 10 is provided with an inverted frusto-conical bottom wall 11,preferably formed integrally with the side walls of the vat. While thevat and its bottom wall may be formed of any suitable material, I preferto form them from a suitable sheet metal, such as a rust resistingsteel, which preferably will be plated or enameled.

It will be understood that suitable supporting openwork trays or baskets(not shown) will be provided in the vat for supporting the dishes andother utensils to be washed.

It will also be understood that the vat 10 will be provided with asuitable supporting casing or framework (not shown) so as to be held ina substantially vertical position and at a convenient height.

In the lower portion of the vat 10 and preferably arranged so as to besubstantially embraced by the bottom wall 1l is a suitable impeller 12which preferably will be driven by a suitable electric motor 13 arrangedon the exterior of the vat below the bottom wall 11. i

It will be understood that the impeller will providedwith blades 12awhich may have any suitable shape, the important feature being that theblades be given a shape such that a cleansing Y :duid in the lowerportion of the vat will be thrown upwardly and outwardly in an efficientmanner through the dish-supporting trays by the rotary motion of theimpeller. -The impeller will be formed from suitable material, such ascast-alum- As shown, the bottom inclined wall of the vat terminates ina, circular opening 15 that is surrounded by a circular inturned flange16.

The frame 14 is secured to the flange 16 by means of a plurality ofcircumferentially spaced bolts 17 which are passed through suitableapertures provided for them in the flange 18 provided on the upper endof the frame 14 and also suitable apertures provided for them in theflange 16. The bolts 17 are received in a clamping ring 20 supported onthe upper surface of the flange 16.

The frame 14, as shown, is provided with a depending skirt 21 ofenlarged diameter. 'I'his skirt serves to secure and support the motor13. As shown, the upper end of the motor is secured to asuitablesupporting ring 22 by means of suitable screw fastening means 23 andthis ring in turn is secured to said skirt by means of suitable screwfastening means 24. Interposed between the supporting ring 22 and theupper wall of the skirt is a suitable resilient spring member 25.

The motor 13 is mechanically connected with the impeller 12 by means ofa shaft 26 which projects ,through the opening l5 in the bottom wall ofthe vat substantially centrally of the vat, that is, so that the shaft26 rotates substantially in the vertical central axis of the vat.

The frame 14 in addition to serving as a support for the impellerdriving motor 13 has several additional functions; it servesl to conveyfresh cleansing water to the vat 10, and further, serves to conductsoiled water from the vat to a suitable drain. The frame 14, as shown,is provided with an inlet or fresh cleansing fluid supply conduit 30 andwith an internal channel or chamber 31 constituting a drain. The `top ofthis chamber or channel opens into the vat through a port 32. The bottomwall 33 of the drain chamber is provided with a central reentrantportion 34. This reentrant portion projects upwardly for some dis. tanceinto the chamber 31 in a substantially vertical direction and, as shownin Fig. l, terminates in an opening 35 arranged in the axis of the vat.Within this opening is supported a sleeve 36 which extends upwardly intothe vat through the port 32 surrounding the motor shaft 26.

Surrounding the sleeve 36 is a valve 37 arranged `to controlcommunication between the vat and the drain chamber 31. 'I'his valve 37is provided with a closure portion 38 which cooperates with a valve seat40 supported by the -frame 14. The valve is further provided with asleeve 41 extending vertically upwardly from the closure portion andarranged in substantially concentric and spaced relation with the sleeve36. The space between these members, as is clearly shown in Fig. 1,communicates directly with the drain chamber 31 and hence functions asan overow passageway for the cleansing fluid or other liquid introducedinto the vat 10.

'I'he valve 37 moves vertically between its closed and open positions,and is guided in its movement by means of a plurality of spaced guidemembers 42 that project inwardly from the sleeve portion 41 and slidablyengage the outer surface of the tubular member 36.

A suitable valve operating member is provided, this member, as shown,comprising a horizontally disposed operating shaft 43 which has aportion extending .into the drain chamber 31. This portion carries anoperating crank 44 which carries a pin 45 that cooperates with an arm38a depending from the valve. Outside of the drain chamber the shaft 43carries a crank arm 46 which is connected with a pivoted operating lever47. This lever 47, as shown, is flxedly pivoted to a pin 48 whereby when.the lever 47 is rotated the shaft 43 will be rotated to operate thevalve 37 connected with it. A manually operable rod'49 is connected withthe lever 47 for operating it to control the position of the valve 37.

'I'he blades 12a of the impeller, as shown, are carried by an apron-likemember 50 which is arranged exteriorly of the valve sleeve 4l and spacedfrom it sutliciently to avoid any possible interference by the valve tothe rotation of the impeller or by the impeller to the opening andclosing movement of the valve.

'Ihe apron-like member 50 tapers inwardly at its upper end where it issecured to the motor shaft 26. As shown, the upper end of the apronlikemember is provided with a reentrant portion 51 which embraces the motorshaft. The impeller is secured to the shaft by means of a suitable screw52.

The above-described arrangement of the bushing 14, the centrallyarranged drain port 32,

the centrally arranged valve for the drain port,

the impeller provided with its apron surrounding the drain valve andproviding for movement of the valve within it, all are described andclaimed in the copending application of Karl K. Huppmann, Serial No.657,781, flied February 21,

. 1933, and assigned to the same assignee as this invention.

The uidsupply conduit 30 of the bushing 14 communicates with avertically arranged conduit 54, the upper end portion 55 of which turnsinwardly and terminates in a chamber 56 arranged in the central axis ofthe vat. This chamber56 communicates with a vertically arranged conduit57 which in turn communicates with and supports a spray device 58 of thereaction type. The conduit 57 carries vanes 59 which support a suitableutensil receiving basket 60. 'Ihe chamber 56 is supported on its sideopposite the conduit 54, 55 by means of a suitable standard 61. It willbe observed that by reason of this arrangement fiuid which is suppliedto the conduit will flow upwardly through the conduits 54, 55 and 57 tothe reaction spray device 58. 'I'his arrangement of the supply conduits54, 55, 57 and of-the reaction spray device 58 is described and claimedin my co-pending application, Serial No. 653,243, led January 24,

1933 and assigned to the same assignee as th invention.

As pointed out, an important feature of the invention is the provisionlof suitable means for supplying the washing vat 10 with a predeterminedquantity of cleansing fluid. It will be understood that for a givenimpeller and for a vat of given shape and proportions, a definite tquantity of water is required for the most enicient cleansing action onthe utensils supported in the vat. If the quantity supplied be material-1y more or less than the requisite quantity, the cleansing operationwill `be less eiiicient.

For the purpose of supplying the vat with a cleansing fluid, I providela suitable conduit member 62 arranged with a pair of conduits 63 and 64.The conduit 63 `constitutes la-uid supply conduit and is provided at itsupper end, as shown, with a suitable nipple 65 whereby it may beconveniently applied to a water faucet such as is usually found in theaverage household. This passageway 63 at its other end communicates witha conduit and valve housing 66- which, as shown, is provided with aconduit 67 communicating with the conduit 63. The conduit 67 terminatesin a chamberL 68 which, as shown, is provided with two valve controlledports 70 and 71. The port 70 communicates with a conduit 72 which inturn communicates with the fluid supply conduit 30 arranged in the frame14. The port 71 communicates with a chamber 73 which in turn, as shownin Fig. .2, communicates with the drain conduit 64. This chamber alsocommunicates` with the drain chamber 31 in the frame 14 through a port74.

The ports 70 and 7l are controlled by means of valves '75' and 76 whichare mechanically interlocked so that only one of the valves can closeits associated port at a time. valves 75 and 76 are mechanicallyconnected Y with a suitable operating lever 77 which is i their oppositecontrolling positions, that is, when As shown, the

the valve 75 is closed and the valve 76 is opened, fluid which issupplied from the conduit 63 will ilow directly into the vdrain conduit64.

In other words, the fluid which is being supplied by the conduit 63 canbe diverted from the vat to the drain conduit 64 merely by operating thevalves to close the port 70 and to open the port 71.

The valves are operated in accordance with a condition of operation ofthe iiuid circulating means, more specifically, in accordance with thearmature current of the impeller driving motor 13, so that when apredetermined quantity of water has been supplied to the vat and hence,when a predetermined load has been imposed on the impeller driving motor13, the valves will be operated tol close the port 70 and to open theport 71. This, as has been previously pointed out, will divert the wateriiowing through the conduit 63 from the vat to the drain conduit 64.

As shown, the valve operating shaft 78 protrudes into a suitable housing80 where an operating lever 81 is secured to the shaft. This operatinglever is biased in a counter-clockwise direction so as to move thevalves to their controlling positions to close the port 70 and to open"the port 7l by means of a suitabletension spring 82. Suitable means areprovided for locking the valves in their other controlling positions,that is, in their positions to open the port 70 and to close the port71. This means comprises a suitable latch 83 which cooperates with a.detont 84 provided in the operating lever 81 so that when the valves arein their positions shown in Fig. 2 to open the port 70 and to close theport 71, the latch 83 will engage the detent 84 to lock the valvesagainst the force applied by the tension spring 82 (see Fig. 3). Thelatch 83 is pivotally mounted upon a suitable lever 85, which is mountedto rotate freely on the shaft 78. The latch isbiased to its latchingposition by means of a compression spring 86.v It will be observed thatwhen the lever 85 is in its position shown in Fig. 3, the latch will besupported in such a position that it can engage the detent 84 so as tolock the valves in their respective positions shown in Fig. 2.

Suitable means are provided for releasing the latch to unlock the lever81 when a predetermined quantity of iiuid has been supplied to the vat.For this purpose, an electromagnetic device 87 is provided to move thelatch to its disengaging position. As shown, the armature 88 of thisdevice is arranged to engage the latch 83 so that when theelectromagnetic device isxenergized, the arxna- I ture will be moved todisengage the latch from the lever 81. The armature 88 is biasedawayfrom its retracted position by means of a compression spring 90.

The lever 85 is provided to return the valves from their controllingpositions in which lthe port 70 is closed and the port 71 opened afterthey have been moved to these positions by the spring 82 and for thispurpose, the lever 85 is mechanically connected with the main drainvalve operating mechanism. The lever 85, as shown, protrudes from oneside of its housing 80. The valve operating lever 47 is provided with apin 91 which as shown clearly in Fig. 1, is received in an elongatedslot 92 provided for it in an ear 93 carried by the protruding end ofthe lever 85, whereby when the lever 49 is moved to actuate the valve37, movement will also b e imparted to' the lever 85. 'I'liisarrangement is such that when a predetermined quantity of water has beensuppliedto the vat and the lever 81 has been released to move to itsposition shown in Figs. 4 and 5 so as to move the valves 75 and 76 toshut off the water from the vat, and then subsequently, the lever 49 isoperated to open the drain valve 37 to drain the vat, the lever 85 willbe carried from its position shown in Fig. 4, which corresponds to theclosedposition of the drain valve, to its position shown in Fig. 5, Thiswill carry the latch 83v to such a position that it'again can engage itsdetent 84 provided in the lever 81. Thus, when the rod 49 is moved toclose the drain valve 37 for a subsequent washing operation the levers85 and 81 will be returned to their positions shown in Fig. 3, therebyconditioning the control mechanism for the valves 75 and 76 for thesubsequent washing operation.

As shown diagrammatically in Fig. 5, the operating coil of theelectromagnetic device 87 is connected in series with the armaturecircuit 13a and field winding 13b of the impeller driving motor 13. Asshown, the motor 13 is energized from a suitable source of electricalsupply 94. A controlling switch 95 is provided in the connectionsbetween the motor and the supply source 94.

In the operation of the fluid measuring means, it will be understoodthat when it is desired to supply the vat with a predetermined quantityof cleansing fluid the drain valve 37 will be closed and the nipple willbe connected with a suitable faucet of a cleansing iiuid supply source,such as a hot water supply. Under these conditions, the various elementsof the valve operating mechanism will be in their respective operativepositions shown in Fig. 3. As shown in Figs. 2 and 3, under theseconditions, the valves 75 and 76 will be in their operative positions toopen the port and close the port 71. When water is turned on, the supplyfluid will flow through the conduit 63, the port 70, the conduit 72, theconduit 30 and thence through the conduits 54. 55 and 57 to the reactionspray device 58. 'I'he water issuing from the reaction spray device willbe hurled in spray form through the vat and eventually will collect inthe lower portion of the vat. As the water continuesto iiow into thevat. and collect in its lower portion, it will impose a graduallyincreasing load upon the impeller which, of course, will impose anincreasing load upon its driving motor 13. As a result of this, thearmature current of the motor will steadily increase. Eventually, when apredetermined quantity of water has been supplied to the vat,

the load imposed upon the motor will be such that it will cause thearmature current to increase to such a value that it will cause thewinding of the electromagnetic device 87 to attract its armature fromits position shown in Fig. 3 to its retracted position shown in Fig. 4.This operation releases the lever 81 which thereupon is moved quicklyfrom its position shown in Fig. 3 to its position shown in Fig. 4.v Thisoperation closes the valve and opens the valve 76. As a result, thewater which is flowing through rthe supply conduit 63 will be divertedfrom the channel 72 and the vat directlyto the drain 64. The waterflowing through the conduit 64 will flow outward through the dischargenozzle portion 64a of the conduit and be received in an ordinary sink orother suitable drain receptacle. The appearance of water flowing fromthe drain passageway constitutes a visual signal to the attendantthat'the proper amount of water has been supplied to the vat for thesubsequent washing operation.

When the washing operation has been completed and it is desired to drainthe vat of the soiled water, the drain valve 37 will be elevated so asto allow the water to flow from the vat down into the drain passageway31. When the operating rod 49 for the valve is operated so as to openthe valve 37, the lever of the valve actuating mechanism will be movedfrom its position shown in Figs. 3 and 4 to its position shown in Fig.5. This, as previously pointed out, will bring the latch 83 to such aposition that it will again engage its detent 84 provided on the lever81. Thus, when the rod 49 is subsequently operated to close the valve37, the lever 85 will be returned to its position shown in Figs. 3 and 4and in so Amoving will return the operating lever 81 to its positionshown in Fig. 3. This, of course, opens the valve 75 and shuts the valve76 which conditions the mechanism for a subsequent washing operation.

As previously pointed out, another important feature of the invention isthe provision of suitable means for causing the water within the vat toflow out into the drain 64. For this purpose, I provide a suitableaspirator between the uid inlet and discharge conduits 63 and 64 so thatthe flow of water from the supply conduit 63 into the drain conduit 64will withdraw the water from the vat and carry it into the drain 64.

As shown in Figs. 1 and 2, the port 71 communicates with the chamber 73through a nozzle-like member 96 of restricted area discharging directlyinto the conduit 64 through the chamber 73. As is well understood bythose skilled in the art, the water which flows through the nozzle 96will reduce the pressure within the chamber 73 because of the increasedvelocity of the water through the restricted member 96. As a result ofthis action, the water within the vat will flow into the chamber 73 fromwhich it will be carried by the stream of water flowing through themember 96 into the discharge conduit 64. Itwill be understood, ofcourse, that Water will be supplied to the conduit 63 until the vat hasbeen drained completely.

The above-described method of draining the vat is of considerableimportance when the washing apparatus is of a portable character `and isnot attached to any permanent drainage fixtures. By reason of theforegoing arrangement, the conduit member 62 may be used to dischargeinto any suitable sink which maybe located at a considerable distanceabove the lever of the drainage chamber 31.

If desired, the aspirator, rather than being provided in the housing 66,may be provided in the conduit member 62 at its discharge end. Anarrangement of this type is shown in Fig. 6. As shown in this figure,the flexible conduit member will be provided with three passagewaysrather than with two, as shown in Fig. 1. The passageway 100 constitutesthe uid supply passageway and the passageway 101 constitutes apassageway communicating directly with the `supplied to the van and thevalve operating mechanism for the valves 75 and 76 has operated thevalves in the manner above-described to divert the water from the vat,the fluid supply will be returned through the conduit 102. The waterowing through the conduit102 will iow from this conduit through theaspirator 103 and thence through the discharge portion 104. This willcause a low pressure area at the discharge end oi' the drain conduit 101which will eil'ect the withdrawalof Water from thevat wherein the drainvalve 37 is opened.

It will be understood that when it is desired to wash dishes or otherutensils that these members will be placed within their racks in thevat, the drain valve 37 will be closed, the motor` switch 95 closed andthe water supply turned on; a predetermined quantity of water will besupplied to the vat as above described. .Usually when the water appearsat the discharge nozzle 64a, the attendant will cut off the watersupply. Then the washing impeller motor will function to throw the watersupplied to the vat upwardly and outwardly through the racks to effect athorough cleansing action on the dishes. When the dishes have beenthoroughly cleansed, the rod 49 will be operated so as to open the drainvalve, and the water supply faucet will again be turned on.4 Thisoperation will supply water, as previously described, to provide theaspirator action that functions to carry the soiled water from the vatand into the drain.

After this the drain valve37 will be closed which. will condition theapparatus for a subsequent washing operation.

In Figs. 7, 8, 9 and 10 a modied form of the invention is shown. Asshown in Fig. 7, the vat of this form is provided 4with an invertedtruslto-conical bottom wall 111. A suitable impeller 112 is arranged inthecentral vertical axis of the'vat and is driven by a motor 114 whichis supported by the bottom wall of the vat by means of a suitablebushing 115 which is mounted. in a centrally arranged aperture 116 pro--vided for it inthe bottom wall. The motor is connected directly to aframe 117 which in turn is mechanically connected with the bushing 115by means of suitable circumferentially spaced set screws 118. v Alsoarranged in the bottom wall of the vat is a. suitable drain port 120which is provided with a drain valve 121. The drain port 120communicates with a drain conduit 122.

The drain valve is carried by means of an arm 123 which, as shown, ispivotally mounted on ears 124 carried by the conduit housing 122. 'I'hearm 123 is secured to a shaft 125; also connected with this shaft is anoperating lever 126. The lever 126 is rigidly secured 'to the shaft sothat the valve can be moved between its open and closed `position byrotating the lever 126. 'This lever is mechanically connected with avalve operating rod 127 which is provided with a handle or knob 128whereby it may be conveniently operated.

'A uid supply conduit 130 communicates with a suitable valve control'device whereby under certain conditions of operation, uld flowing fromthe supply conduit 130 is directed to the vat and under other conditionsof operation is diverted from the-vat andinto a suitable drain.

As shown in Fig. 8, the supply conduit 130 communicates with a chamber131 of a suitable valve housing. In this chamber are arranged a pair ofports r-132 and 133 which are provided with controlling valves 134 and135, respectively. These valves are arranged as are the valves 75 and 76of the form of the invention shown in Figs. 1 to 5 inclusive, that is,they are mechanically interlocked by means of a lever 136 so that onlyone of the valves can close its associated port at a time. The valveport 132 communicates with a conduit 137 which in turn /communicates`with the intake of a suitable pump 138 (Figs. 8 and 9). The discharge140 of lthis pump communicates with a suitable drainconduit 141 (Fig.7). The valve port 133 communicates with the intake of a suitable pump142 by means of a conduit 143. The discharge 144 of thispumpcommunicates with a conduit 145 which in turn communicates with thevat, as clearly shown in Fig. 7.

It will be understood that the conduit 145 will communicate with anupright conduit l146 in the vat which is similar to theconduit 54, 55 ofFig. 1 and which in turn communicates with a reaction spray device ofthe same construction as that shown in Fig. 1.

As shown in Fig. 7, the conduit 122 also communicates with theV intakeof the drain pump 138. As shown inthis figure, it is preferable that thepump structure together with the valves 134 and 135 andtheir associatedmechanism be supported directly by the drain conduit 122.

It will be understood that the fluid supply conduit 130 and the drainconduit 141 may be formed in a flexible member l(not shown) similar tothe supply and drain conduits 63 and 64 shown in Fig. 1.

Preferably, the pumps 138 and 142 will be mounted upon a commonoperating shaft 147 which is mechanically connected with the impellerdriving motor 114 by means of a belt'drive 147a. The pump chambers,however, are completely separated so that it is impossible for the freshwater supply pump to become contaminated by the soiled water which isforced through the drain pump 138.

The lever 136 is mounted upon a suitable shaft 148 which protrudesfrornthe chamber 131 to the exterior of the valve housing, as shown inFigs. 7 and 10. Mounted on the protruding portion of the shaft 148 is anoperating lever 149. This lever is biased in .a clockwise direction, asviewed in Figs. 7 and 10, by means of a. tension spring 150 so as tobias the valves to close the port 133 and to open the port 132. In otherwords, the spring biases the valves. to such operative positions thatthe uid supply conduit 130 is connected with the drain conduit 141rather than with the vat 110.

Suitable means are provided `for locking the operating lever 149 in itsother controllingy position, namely, in that position to close the valve134 and to open the valve 135. This means comprises an electromagneticdevice 151, the armature 152 of which is pivotally mounted, as shown inFigs. 7 and 10, so that it can engage a detent 153 provided in theoperating lever 149 to lock the leverl in such a position that the valve134 is closed and the valve 135 is opened. 'I'he armature 152 is biasedto its locking position by means of a suitable tension spring 154.

The lever 149 isfmoved in a'counter-clockwise direction, as viewed inFigs. 7 and 10, so as to be moved to its controlling positionto open thevalve 135 and to close the valve 134 by means of suitable mechanismoperated by the drain valve operating -lever 127. As shown in Fig. 1,the valve operating lever 127 is mechanically connected with a lever 155at a point intermediate wherein the valve 134 is closed and the valve135 lso is opened. v

The latch 157, as shown, is pivotally secured to the lever 155 and isbiased against a suitable stop 158 carried by the lever by means of asuitable tension spring 160. It is to be understood that when the rod127 is elevated to close the drain .A valve 121, and to raise the lever155 and the latch 157, the latch 157 will engage the lever 149 duringthe initial part oi 'its movement to move it from its position shown inFig. 7 to its position shown in Fig. 10, and when the lever 149 hasbeenmoved to the latter position, the latch 157 will clear the lever149, as shown in Fig. 10, so as to permit the lever 149 to besubsequently returned to its position shown in Fig. 7 independently ofthe latch 157.

As shown diagrammatically in Fig. 10, the motor 114 is electricallyconnected with a suitable source `of electrical supply 161 through asuitable controlling switch 162. As also shown in this iigure, theoperating coil of the electromagnetic device 151 is electricallyconnected in series with the Aarmature circuit of the motor 114.

Assuming that the various elements of the apparatus are-in theirrespective operative positions shown in Figs. 7, 8 and 9, and it isdesired to wash dishes placed .within the vat, the drain valve 121 willbe moved to its closed position by elevating the valve operating rod127. This operation of the rod not only will close the drain valve 121,but also will condition the control mechanism providedfor the valves 134and 135 so as to divert the water ilowing into the vat from the vat .andinto the drain when a predetermined quantity of water has been suppliedto the vat. That is, when the drain valveis closed, the lever 155 willbe moved upwardly so as to move the valve operating lever 149 to closethe valve 134 and to open the valve 135. As described previously, thelever 149 will be locked in this posi tion by means of the armature 152.

Then the iiuid supply will be turned on and Water iiowing from theconduit 130 into the housing 131 will flow through the valve port 133into the conduit 143and thence into the intake passageway of the pump142. 'I'his water, as previously pointed out, will be pumped through thepump discharge 144 to the conduit 145 and thence into the vat.

Water which is thus fed into the vat will accumulate therein because`the drain valve is closed and hence will impose a gradually increasingload on the impeller and its driving motor 114. When a predeterminedquantity .oi water has been supplied to the vat, the armature current ofthe motor will have been increased to such a value that it will causethe winding of the electromagnetic device '1 to attract its armature152, thereby releasing the valve 'operating lever 149.

This lever will be moved under the influence oi.' its spring 150 toclose the valve 135 and to open the valve 134. This operation will cutthe water off from the vat and will divert the incoming water into theintake of the drain pump 138. This pump will pump the water into thedrain conduit 141. If a iiexible conduit of the type shown in Fig. 1 beused, water appearing at the discharge of the' drain conduit willconstitute a visual signal to the attendant that the proper quantity ofwater has been applied to the vat.. If the conduit be connected with aiixed drain, the sound o! the water owing into the drain will constitutean audible signal to the attendant that the proper quantity oi' waterhas been supplied.

The valve operating lever 149 after this operation will occupy theposition shown in Fig. 7.

When the lever is in this .position the armature will engage a suitableabutment l63-provlded on the lever to limit its motion in the clockwisedirection under the iniiuence of the spring 150.

When the washing operation has been completed and it is desired to drainthe vat, the rod 127 will be depressed, which .operation will open thedrainA- valve 121. The soiled iluid in the vat will then be pumped tothe drain 141 by means of the pump 138. At the same time that the rod127 is depressed, the latch 157 will be moved over -the associated endof the lever 149 so as to slide under it as shown in Fig. 7. It will be.understood that the latch 157 can be moved over the end of the lever149 by reason o1 its pivotal connection withthe lever 155. When thedrain valve is clsed for a subsequent washing operation, the latch 157will operate the lever 149 to open the valve 135 and to close the valve134. l

When all the Water has been drained from the vat, the switch 162 will bethrown so as to deenergize the motor 114.`

While I have shown particular embodiments o! my invention, it will beunderstood, of course, that I do not wish to be limited thereto-sincemany modifications may be made, and I, there- -fore, contemplate by theappended claims to cover any such modiilcations as fall within the truespirit and scope of my invention.

l What I claim as new land desire to secure by Letters Patent of theUnited States, is:

1. Dishwashing lapparatus. comprising a vat adaptedto contain acleansing fluid, iluid circulating means in said vat to circulate saidfluid, conduit means for supplying a cleansing. uid to said vat, conduitmeans for draining said vat, valve means between said iluid supplyingand draining conduit means and means operably associated with said fluidcirculating means so as to respond to a condition of operation thereofthat varies as the quantity of fluid in said vat acted upon by saidfluid circulating means varies controlling the operation of said valvemeans so as to control the ilow oi.' iluid between. said fluid supplyingand draining conduit means in accordance with the quantity of fluid insaid vat.

2. Dishwashing apparatus comprising a vat, conduit means for supplyingsaid vat with a cleansing iluid, power means for circulating the fluidcontained in said vat, drain conduit means i'or said vat and means'operably associated with said power means so as to respond to themagnitude o1' the load imposed on said power means in' .vat. valve meansbetween saidrluid supply and said drain conduits, and means operablyassociated with said motor so as to respond to the magnitude of the loadimposed on said motor when operating said iiuid circulating meanscontrolling said valve means so as to establish communication betweensaid conduit means when a lpredetermined quantity of fluid has beensupplied to said vat. 4

4. Dishwashing apparatus comprising a vat, means for circulating acleansing iiuid contained in said vat, a motor for driving said uidcirculating means, a conduit for conveying a cleansing iluid to saidvat, a drain conduit, a valve device between said conduits arranged toestablish communication between them and electro-responsive Ameansoperably associated with said motor so as to be energized responsivelyto the magnitude of the armature current of said motor controlling saidvalve device to establish communication between said conduits when saidarmature current attains a predetermined magnitude.

5. Dishwashing apparatus comprising a vat, means for circulating acleansing fluid contained in said vat, a motor for driving said fluidcirculating means, a conduit for conveying a cleansing fluid to saidvat, a drain conduit for said vat, a drain valve controlling thedrainage of uid through said drain conduit, valve means arranged toestablish communication between said fluid supply conduit and said drainconduit and an electro-magnetic device connected in the armature circuitof said motor so as to be -energized by the armature current of saidmotor controlling said valve-means to establish communication betweensaid conduits when said armature current attains a predetermined highvalue.

6. Dishwashing apparatus comprising a vat, means for circulating acleansing fluid contained in said vat, a motor for driving said iluidcirculating means, a conduit for conveying a cleansing iiuid to saidvat, a drain conduit for said vat, a drain valve controlling thedrainage o f iluid through said drain conduit, a valve devicecontrolling said conduits arranged when in one position to establishcommunication between said supply conduit and said vat, and in anotherposition to disconnect the supply conduit from said vat and to connectit with said drain conduit, resilient means biasing said valve device tosaid second controlling position, means for locking said device in saidrst controlling position against the force of said resilient means andcontrol means for said locking means operably associated with said motorso as to respond -to the mag,- nitude of the load imposed on said motorin circulating fluid in said vat arranged to release said locking meanswhen said load attains a predetermined magnitude, whereupon, saidresilient means moves said valve device to said second controllingposition.

7. Dishwashing apparatus comprising a vat, means for circulating acleansing fluid contained in said vat, a motor for driving said iluidcirculating means, a conduit-for conveying a cleansing iiuid to saidvat, a drain conduit for said vat, a drain valve controlling thedrainage of fluid through said drain conduit, a valve devicecontrollingsaid conduits arranged when in one position to establish communicationbetween said supply conduit and said vat and in another position todisconnect the supply conduit from said vat and to connect it with saiddrain conduit, resilient means biasing said valve device to said secondcontrolling position, latching means for locking said device in said rstcontrolling position against the force of said resilient means,electroresponsive means for releasing said latching means operablyassociated with said motor to respond to the magnitude of the loadimposed there.- on in circulating fluid in said vat, actuating means formoving said drain valve to its open and closed positions and meansoperated by said valve actuating meansl when the latter functions toclose said drain valve for moving said valve device to said firstcontrolling position against the force of said resilient means, saidlatching means then operating to lock said valve device in said firstcontrolling DOSition;

8. In a dishwashing apparatus comprising a vat adapted to contain acleansing iluid, uid circulating means in said vat to circulate saidfluid, a iluid supply conduit and a iluid drain conduit for said vat, adrain valve controlling the drainage oi fluid through said drainconduit, uid conduit means between said vat and said supply and saiddrain conduits respectively, iluid conduit meansbetween the uid supplyand said iluid drain conduits arranged to' divert uid owing in saidsupply conduit from said vat to said drain conduit, valve meanscontrolling said fluid conduit means between said fluid supply and saidiluid drain conduits, and means operably associated with said fluidcirculating means so as to respond to a condition f operation thereofthat varies as the quantity of fluid in said vatl acted upon by saidiluid circulating means varies controlling said valve means so as toestablish communication between said fluid supply and drain conduitswhen a predetermined quantity of iiuid has been supplied to said vat,said fluid conduit means between said iluld supply and said drainconduits having a portion of restricted area lo cated with respect tothe conduit means between said drain conduit and said vat so as toprovide aspirator action between the uid to said vat and that owing fromsaid supply to said drain conduits whereby movement oi iluid` from saidvat is effected by the ow of iluid from said supply to said drainconduits when said drain valve is open.

9. Dishwashing apparatus comprising a vat, a fluid circulating impellerin said vat, a driving motor for said impeller, a uid supply conduit anda fluid drain conduit for said vat, fluid conduits between said vat andsaid supply and said drain conduits respectively, a drain valveccntrolling the drainage of iluid through said conduit between said vatand said drain conduit, a fluid conduit between said fluid supply andsaid fluid drain conduits arranged to divert uid owing in said supplyconduit from said vat to said drain conduit, valve means controllingsaid fluid conduit between said uid supply and said fluid drainconduits, and means operably associated with said motor so as to respondto the magnitude of the load imposed thereon in operating said impellercontrolling said valve means so as to establish communication betweensaid iiuid supply and drain conduits when a predetermined quantity ofuid has been supplied to said vat, said uid conduit between said fluidsupply and said drain conduits having a portion of restricted arealocated with respect to the conduit between said drain conduit and saidvat so as to provide aspirator action between the uid in said vat andthat flowing from said supply to said drain conduits when said valvemeans has operated to connect said conduits, whereby movement of uidfrom said vat is eiected by the flow of fluid from said supply to saiddrain conduit when said drain valve is opened.

10. In a dishwashing apparatus comprising a vat, a iluidconduitconnected with said vat, a uid supply pump having its dischargeconnected with said iluid conduit so as to be connected with said vatthrough said conduit, a uid drain conduit connected with said vat, aiiuid drain pump having its intake connected with said fluid drainconduit, a iluid supply conduit connected with the intakes of both ofsaid fluid supply and drain pumps, a pair of valves controlling the flowof duid from said iiuid supply conduit to the intakesk of said uidsupply pump and of said fluid drain pump respectively, interlockingmeans between said valves so that they can be operated to connect saidfluid supply conduit to only one of said pumps at a time and means foroperating said valves.

l1. Dishwashing apparatus comprising a vat adapted to contain acleansing uid, iluid circulating means in said vat to circulate saidfluid, a iiuid conduit connected to said vat, a fluid supply pump havingits discharge connected with said uid conduit soas to be connected withsaid vat through said conduit, a fluid drain conduit connected with saidvat, a drain pump having its intake connected with said fluid drainconduit,

v a iiuid supply conduit connected with the intakes of both of said'iiuid supply and drain pumps, valve means between said uid supplyconduit and said intakes of said pumps arranged to direct duid from saidsupply conduit to either the intake of said fluid supply pump or that oisaid .fluid drain pump, and means operably associated with said fluidcirculating means to respond to a condition of operationof said iluidcirculating means that varies as the quantity of fluid in said vatvaries. controlling said valve means in accordance with'the quantity offluid in said vat.

12. Dishwashing apparatus comprising a vat adapted to contain a cleaningfluid, uid circulating means in said vat to circulate said uid, a motorfor driving said iiuid circulating means, a uid conduit connected withsaid vat, a uid supply pump having its discharge connected with saidiiuid conduit so as to be connected with said vat through said conduit,a ud drain conduit connected with said vat, a fluid drain pump havingits intake connected with said drain conduit, a fluidsupply conduitconnected with the intakes of both of said pumps, valve means betweensaid .iiuid supply conduit and said intakes of said operably associatedwith said motor to respond to the amature current of said motor whichvaries as the quantity o! iluid in said vat varies for controlling said-valve means to divert water from said fluid supply conduit to saiddrain pump when a predetermined quantity of fluid has been supplied tosaid vat. l

13. Dishwashing apparatus comprising a vat adapted to contain acleansing fluid, fluid circulating means in said vat to circulate saidfluid,

means for supplying iluid to said vat, means i'or 1 draining said vatand control means for said iluid supply means operably associated withsaid drain \means so as to be conditioned to control said iluid supplymeans in accordance with the operation ot said drain means, and further.operably associated with said iluid circulating means to respond to acondition oi operation thereof that' varies as the quantity of uid insaid vat varies so as to control the operation oi said iiuid supplymeans in accordance with the quantity oi iluid in said vat.

f 14. 'Dishwashing apparatus comprising a vat adapted to contain acleansing iluid, fluid circulating means in said vatto circulate saidiluid,

means for supplying iiuid to said vat, la drain of said drain valveoperating means.

l5. Dishwashing apparatus comprising a vat, a conduit for supplyingcleansing duid to said vat, power means for circulating the iluidcontained inl said vat, a drain conduit for said vat, a drain valve forsaid vat controlling the drainage of uld through said drain conduit,means operably associated with said power means so as to respond to theload imposed on said power means in operating to circulate fluid in saidvat controlling said fluid supply and drain conduits so as to establishcommunication between said iiuid supply conduit and said drain conduitwhen the load on said power means attains a predetermined high value andmeans for withdrawing iluid from said vat when said communication hasbeen established and said drain valve is open.

JESSE H. CLARK.

CERTIFICATE or CORRECTION.

Puem'No. 1,995,634. Maren 26.

JESSE H. CLARK.

It is herely certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 7,second column. line 38, claim 8, for "to" read in; and that the saidLetters Patent should be read with this ycorrection therein-that thesame may conform to the record of the case in the Patent Office. f

signed and sealedv this 28m any 'of Ma-A. D. 193s.

Leslie Frazer (Seal) Acting Commissioner of Patents

